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Home Return to list Severe Thunderstorm Warning 0259 Issued by the Bismarck Forecast Office
Action: New Issued At: 2026-08-11 18:24:11
315
WUUS53 KBIS 112323
SVRBIS
NDC011-087-120030-
/O.NEW.KBIS.SV.W.0259.260811T2323Z-260812T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
Issued by National Weather Service Grand Forks ND
523 PM MDT Tue Aug 11 2026
The National Weather Service in Bismarck has issued a
* Severe Thunderstorm Warning for...
North central Bowman County in southwestern North Dakota...
Central Slope County in southwestern North Dakota...
* Until 630 PM MDT.
* At 523 PM MDT, a severe thunderstorm was located near Rhame, or 16
miles northwest of Bowman, moving east at 20 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* Locations impacted include...
Rhame and Amidon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4663 10338 4663 10333 4631 10310 4620 10371
4644 10384
TIME...MOT...LOC 2323Z 252DEG 16KT 4633 10366
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Lynch
Action: Continued Issued At: 2026-08-11 18:34:56
750
WWUS53 KBIS 112334
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
534 PM MDT Tue Aug 11 2026
NDC011-112344-
/O.CAN.KBIS.SV.W.0259.000000T0000Z-260812T0030Z/
Bowman ND-
534 PM MDT Tue Aug 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BOWMAN COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until midnight MDT for
southwestern North Dakota.
&&
LAT...LON 4663 10338 4663 10333 4631 10310 4628 10328
4628 10363 4648 10374
TIME...MOT...LOC 2334Z 252DEG 18KT 4636 10353
$$
NDC087-120030-
/O.CON.KBIS.SV.W.0259.000000T0000Z-260812T0030Z/
Slope ND-
534 PM MDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM MDT
FOR CENTRAL SLOPE COUNTY...
At 534 PM MDT, a severe thunderstorm was located 10 miles northeast
of Rhame, or 13 miles northwest of Bowman, moving east at 20 mph.
HAZARD...Tennis ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Amidon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4663 10338 4663 10333 4631 10310 4628 10328
4628 10363 4648 10374
TIME...MOT...LOC 2334Z 252DEG 18KT 4636 10353
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
ADAM
Action: Cancelled Issued At: 2026-08-11 18:34:56
750
WWUS53 KBIS 112334
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
534 PM MDT Tue Aug 11 2026
NDC011-112344-
/O.CAN.KBIS.SV.W.0259.000000T0000Z-260812T0030Z/
Bowman ND-
534 PM MDT Tue Aug 11 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BOWMAN COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until midnight MDT for
southwestern North Dakota.
&&
LAT...LON 4663 10338 4663 10333 4631 10310 4628 10328
4628 10363 4648 10374
TIME...MOT...LOC 2334Z 252DEG 18KT 4636 10353
$$
NDC087-120030-
/O.CON.KBIS.SV.W.0259.000000T0000Z-260812T0030Z/
Slope ND-
534 PM MDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM MDT
FOR CENTRAL SLOPE COUNTY...
At 534 PM MDT, a severe thunderstorm was located 10 miles northeast
of Rhame, or 13 miles northwest of Bowman, moving east at 20 mph.
HAZARD...Tennis ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Amidon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4663 10338 4663 10333 4631 10310 4628 10328
4628 10363 4648 10374
TIME...MOT...LOC 2334Z 252DEG 18KT 4636 10353
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
ADAM
Action: Continued Issued At: 2026-08-11 18:58:56
634
WWUS53 KBIS 112358
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
558 PM MDT Tue Aug 11 2026
NDC087-120030-
/O.CON.KBIS.SV.W.0259.000000T0000Z-260812T0030Z/
Slope ND-
558 PM MDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM MDT
FOR EASTERN SLOPE COUNTY...
At 557 PM MDT, a severe thunderstorm was located 6 miles southwest of
Amidon, or 14 miles north of Bowman, moving east at 20 mph.
THIS IS A DESTRUCTIVE STORM FOR PORTIONS OF CENTRAL SLOPE COUNTY.
HAZARD...Baseball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be severely injured.
Expect shattered windows, extensive damage to roofs,
siding, and vehicles.
Locations impacted include...
Amidon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4658 10330 4631 10310 4628 10328 4628 10348
4647 10360
TIME...MOT...LOC 2357Z 252DEG 16KT 4639 10338
THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
ADAM
Action: Continued Issued At: 2026-08-11 19:10:27
885
WWUS53 KBIS 120009
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
609 PM MDT Tue Aug 11 2026
NDC087-120030-
/O.CON.KBIS.SV.W.0259.000000T0000Z-260812T0030Z/
Slope ND-
609 PM MDT Tue Aug 11 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM MDT
FOR SOUTHEASTERN SLOPE COUNTY...
At 609 PM MDT, a severe thunderstorm was located 10 miles southeast
of Amidon, or 15 miles northeast of Bowman, moving east at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe thunderstorm will remain over mainly rural areas of
southeastern Slope County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4648 10323 4631 10310 4628 10330 4642 10343
TIME...MOT...LOC 0009Z 278DEG 20KT 4636 10320
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
ADAM
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